32.7.4. Response Modification Factors

Try these first

1. 1.

   What do response modification factors do?

   Hint

   Think about how buildings are designed to absorb forces.

2. 2.

   What is an R-Factor?

   Hint

   This factor is essential in seismic design codes.

3. 3.

   What is the primary purpose of response modification factors?

   • To reduce earthquake forces
   • To increase material costs
   • To complicate designs

   Hint

   Consider the outcome of their application in structures.

4. 4.

   True or False: R-factors are uniform for all types of structures.

   • True
   • False

   Hint

   Think about the differences in types of building systems.

5. 5.

   Given a building with an R-factor of 4, calculate the expected seismic forces if the base shear calculated is 120 kN.

   Hint

   Remember to divide the base shear by the R-factor to find the modified force.

6. 6.

   Discuss the implications of underestimating the R-factor for a hospital in a seismic zone and suggest retrofitting measures.

   Hint

   Think about how retrofitting can enhance energy absorption in existing buildings.